The pulse width modulation character of voltage drive -type pulse width modulator TL494 is introduced. The applicable situation of TL494 in semi -bridge alternate switch power is also analyzed.
介绍了电压驱动型脉宽调制器件TL494的脉宽调制特性，并对其在半桥变换开关电源中的应用情况做了分析。
In pulse code modulation, the representation of the quantized samples of an analogue signal by character signals according to a defined code.
在脉码调制技术中，按照确定的代码由字符信号对模拟信号量化采样的表示法。
This paper introduces the fundamental principles and character of PDM modulation of class E amplifier square circuit.
本文介绍了E类放大器方阵电路PDM调制的基本原理和调制特性。
The use of frequency convert to regulate the speed of rotation according to the character of mine fan can reach the goal of the modulation of air flow and have a very good effect of saving energy.
根据矿井通风机的特性，使用变频器进行转速调整以达到调节风量的目的，且有很好的节能效果。
The orthogonal multicarrier modulation, which is the main character of OFDM, determines that it is very sensitive to both timing synchronization error and carrier frequency offset.
OFDM系统自身的正交多载波调制特点，决定了其对定时误差和载波频率偏差十分敏感。
But the mobile communication environment regarding the traditional QAM modulation is the serious challenge, but in teaches in the character mobile communication system also to have USES QAM.
但是移动通信的环境对于传统的QAM调制是严重的挑战，不过在教字移动通信系统中也有使用QAM的。
But the mobile communication environment regarding the traditional QAM modulation is the serious challenge, but in teaches in the character mobile communication system also to have USES QAM.
但是移动通信的环境对于传统的QAM调制是严重的挑战，不过在教字移动通信系统中也有使用QAM的。
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